Steel alloy



PW May 7,1929. a 1,711,733

UNITED-"STATES: PATENT OFFICE.

EDUARD HOUDREMONT, OF ESSEN, AND- VICTOR EIIMCKE, OF RSSEH-HUGEL, GER- MANY, ASSIGNOBS 'IO FRIED, KRUPJ? .AKTIENGESELLSCHAFT, 0F ESSEN-ON #111,}?- RUHB, GERMANY.

STEEL ALLOY.

No Drawing. Application filed January 11, 1928, Serial No. 246,082,-an (1 in Germany January 2 8, 1927.

The invention has for its object to pro- What we claim and desire to secure by duce steel alloys which possess high Letters Patent, is strengths at high temperatures. This object 1. A steel alloy consisting of 8 to --18 per obtained according to the invention by the cent of croinium, 2 to 12 per cent of mangafact, that the steel alloy contains 8 to '18 nose, 3 to 12 per cent of tungsten, and up 20 per cent of chromium, 2 to 12 per cent of 'to l per cent of carbon. manganese, 3 to 12 per cent of tungsten, and 2. A steel alloy consisting of 12 to 14 per up to 1 per cent of carbon. cent of chromium, about 5 per cent of man- Steel alloys have been proved to have ganese, about 5 per cent of tungsten, and

quite particularly high strengths at high about O.5'per cent of carbon. 2 5

temperatures, which contain, besides the The foregoing specification signed at otherwise usual admixtures, 12 to 14 per cent Cologne, Germany, this 19th day of Decemof chromium, about 5 per cent of manganese, ber, 1927. about 5 per cent of tungsten, and about 0.5 EDUARD HOUDREMONT. 15 per cent of carbon. v VICTOR EHMOKE. 

